Re: [Elecraft] Subject: Waaay OT: A new kind of QRM to be aware of ... warning issued by FCC today

This thread has already been closed. Please post no more messages on this topic. 73, Eric WA6HHQ *elecraft.com * On Tue, Jan 19, 2021 at 6:35 PM Chris Cox, N0UK wrote: > Spot on,Phil. > > Chris Cox, N0UK > chr...@chris.org > > > > > On Jan 18, 2021, at 12:07 PM, Phil Kane

Re: [Elecraft] Absurd remarks about FCC and ARRL notices.

This thread has already been closed. Please post no more messages on this topic. 73, Eric WA6HHQ Moderator etc. *elecraft.com * On Tue, Jan 19, 2021 at 5:45 AM Robert Sands wrote: > Serious thinkers need to quietly look at the meaning of "incite", > "promote",

Re: [Elecraft] Efficiency of MFJ remotely-tuned loop antennas

A couple of people expressed an interest so here is a link to a presentation on my mag loop. It's a while since the presentation was given but the loop is still in service in the gamma match configuration.

Re: [Elecraft] Efficiency of MFJ remotely-tuned loop antennas

1 vote for interest! 73, Fred ["Skip"] K6DGW Sparks NV DM09dn Washoe County On 1/19/2021 4:39 PM, Andy Durbin wrote: "although I saw a design not long ago that used two coaxial copper pipes with a PVC pipe as the insulator. The inside conductor was mounted to a long threaded rod moving it

Re: [Elecraft] Subject: Waaay OT: A new kind of QRM to be aware of ... warning issued by FCC today

Spot on,Phil. Chris Cox, N0UK chr...@chris.org > On Jan 18, 2021, at 12:07 PM, Phil Kane wrote: > > On 1/18/2021 6:10 AM, Steve Hall wrote: > >> During my hamming of over 50 years, the FCC has never felt it necessary to >> threaten hams not to break the law, that is not until we have this

Re: [Elecraft] Mag Loop from MFJ

FWIW - I invested in an MFJ-1786 when we moved into our apartment 6 1/2 years ago. Since then, kit has been out on our 5th floor balcony in central Minneapolis year round, easily standing up to both Minnesotan Winters and Summers with aplomb. It has not ceased to work in that time and has

Re: [Elecraft] K4 Receive Filter question

Not to pick on Bruce, but there have been many posts to this thread with essentially the same thought. However, none of them talk about what I see as one of the most important performance characteristics, which is the user interface (UI). How easy it the radio to use? For me, I do a lot of

[Elecraft] Efficiency of MFJ remotely-tuned loop antennas

"although I saw a design not long ago that used two coaxial copper pipes with a PVC pipe as the insulator. The inside conductor was mounted to a long threaded rod moving it in and out of the outer conductor." Not my original idea but that's what I have on my loop (PEX insulator not PVC).

Re: [Elecraft] Absurd remarks about FCC and ARRL notices.

When will this end? Please! Enough! Dave wo2x Sent from my waxed string and tin cans. > On Jan 19, 2021, at 7:03 PM, Al London wrote: > > There seems to be a misunderstanding of my thanking jim not geoffrey. I had > no intention of thanking or condoning political diatribe in this forum. So

Re: [Elecraft] Absurd remarks about FCC and ARRL notices.

There seems to be a misunderstanding of my thanking jim not geoffrey. I had no intention of thanking or condoning political diatribe in this forum. So Geoff your response to my "thanks" is not warranted. Al N4diy On Tue, Jan 19, 2021, 6:49 PM Barry wrote: > There's no place for anonymous

Re: [Elecraft] Efficiency of MFJ remotely-tuned loop antennas

Here's an interior shot of the tuning capacitor https://imgur.com/a/sYdvgzF -Eric KI7LTT On Mon, Jan 18, 2021 at 10:59 PM Alan Bloom wrote: > > That doesn't sound like they are welded, and given the cost > difference for welded air variables I doubt MFJ used them. > > As I said, I don't have

Re: [Elecraft] Absurd remarks about FCC and ARRL notices.

There's no place for anonymous posting, either. How hard is it to include your name and/or call? Barry W2UP Elecraft mailing list wrote > Listen. > This is no place for political BS. I don’t care if you are right, left, or > in the f’ing middle. This is a place to discuss Elecraft equipment,

Re: [Elecraft] Efficiency of MFJ remotely-tuned loop antennas

Certainly don't want to throw away power in wasted heat, but when I turn down my 200W rig to 5W for QRP, it's still useful and that's 16 dB down. With ant restrictions, I'm looking at building a small horizontal loop for 6m.  It'd be a little more than 4' in circumference, 16" dia,  and the

Re: [Elecraft] Efficiency of MFJ remotely-tuned loop antennas

I've been convinced that AEA's specification of 72% efficiency for the Isoloop at 14 MHz is too high, certainly too high for the MFJ antennas.  So I re-did the calculations using the 59% efficiency figure calculated below.  The new results can be downloaded here:

Re: [Elecraft] Absurd remarks about FCC and ARRL notices.

Thanks for posting this originally - I wouldn't have seen it otherwise. The problem with political discussions - especially in the world of 24/7 news coverage and op eds - we all show how uneducated we are on the topics and are willing to believe what we are told without doing the research. The

Re: [Elecraft] Something different, old memories and using the KX3

Well done, Paul. It is a joy to read your account and I know you have had some great adventures. You are right about we older folks who cherish the memories of our adventures through the years. 73, Dave, K4TO On Tue, Jan 19, 2021 at 5:06 PM Paul GACEK via Elecraft < elecraft@mailman.qth.net>

[Elecraft] Something different, old memories and using the KX3

I’ve been sorting out some of my LoTW records which inevitably covered the 2016 NPOTA event. I did a lot of low power phone activations in the Western USA using my KX3 for NPOTA many in the San Francisco Bay Area when I was living in that fine city. Loved the event, love my KX3 and just

Re: [Elecraft] Absurd remarks about FCC and ARRL notices.

My overworked business partner (WA6HHQ) is rightly trying to shut down this thread. We certainly don't want red and blue Elecraft forums. Before he does, I'd like to slip in a final comment. The intent of my posting (yes, I started this) was to call attention to a highly unusual FCC

Re: [Elecraft] Absurd remarks about FCC and ARRL notices.

Jim Thank you for your concise comments. Greatly appreciated. The last thing we need is more politics. Al N4DIY Sent from my Verizon, Samsung Note20 smartphone From: elecraft-boun...@mailman.qth.net on behalf of kennedyjp Sent: Tuesday, January 19, 2021

Re: [Elecraft] Absurd remarks about FCC and ARRL notices.

Enough already. Keep your political views and beliefs off this forum.  Not needed, not wanted. JimW7OUU Sent via the Samsung Galaxy S9+, an AT 5G Evolution capable smartphone Original message From: Geoffrey Feldman Date: 1/18/21 19:06 (GMT-07:00) To:

[Elecraft] Absurd remarks about FCC and ARRL notices.

This new OT topic and the preceding old OT topic combined has been one of the greatest examples of free speech I have ever seen on-line. Kudos to this forum for open and honest participation, it fills me with hope to see such a wonderful exchange of contrasting viewpoints without digital

Re: [Elecraft] Efficiency of MFJ remotely-tuned loop antennas

The plates in the two air variables in the [now ancient] ARC-5 command TX from WW2 were very securely welded in place to the rotor axle.  We'd remove many of the rotor plates and re-pad it with a fixed capacitor to spread out the ham band on the dial.  It took a lot of bending back and forth

Re: [Elecraft] K4 Receive Filter question

I happen to own the K3S that is #5 or Rob's list.  I also got tired of waiting on the K4 and having a burning desire for a new radio I have a month-old TS-890, which is now my primary radio.  The K3S is set up in a receive-only state, sharing the RX antenna out of the '890. A few mornings ago

Re: [Elecraft] K4 Receive Filter question

I own a radio that's currently #1 on Sherwood's list. My 20 year old K2 is essentially equal at digging weak CW out of the noise (always dominated by band noise and not the noise floor of the rig) in virtually all situations I've run into. The K2 has no KSSB so I don't compare it on SSB. If I

Re: [Elecraft] K4 Receive Filter question

I have followed the Sherwood Receiver test data over the years and I know Elecraft has always been in or near the top spot. I also would be reluctant to upgrade to a K4 if my K3 is the same or pretty close to the same in the key performance characteristics. I wonder whether we are nearing the

Re: [Elecraft] K4 Receive Filter question

Bruce, Below are the receiver sensitivity specs from page 42 of the recently updated manual Sensitivity    (MDS) (Typical    values;    main    or sub    RX,    BW    =    500    Hz) 0.1-1.5    MHz*:                Preamp    OFF/1/2: -120/-130/-135        dBm 1.5-23    MHz:               

Re: [Elecraft] K4 Receive Filter question

I work in the 2 to 3 db above the noise floor CW, and 6 to 10 db above the noise floor on SSB now, (that is why I presently own a K3s and a P3VGA) so I guess I will have to wait for the real answer. I really cannot believe that Elecraft did not run their own test. If and when I spend my cash I am

[Elecraft] Explained: K4/K4D receive performance vs. K3S

> BRUCE WW8II wrote: > > The question is will the K4 or K4D be as good or better on receive than my > K3s with the > 2.1kHz and the 200Hz filters. > > Bruce WW8II Bruce, First, a bit of background would help since they're two different architectures. The K4/K4D are "pure" SDRs, meaning

Re: [Elecraft] KPA1500 Remote Operation

You do not need a computer - just use a usb to ethernet server such as Silex DS-510 (USB2 to Gigabit) or DS-600 (USB3 to Gigabit). I am using them and I can remotely access the KPA500 and KAT500 without using a computer in the shack. You may need a RS232 to USB adapter in addition for the

Re: [Elecraft] Automatic lightning protection for radios, an off the wall idea

I also received a link to: which is also an antenna disconnect. Note that the web page is in German, but you can download an English version of the manual. A device that only disconnects the antenna fixes only part of the problem. What I would

[Elecraft] KPA1500 Remote Operation

Just curious. Not being very knowledgeable about networking, I'd like to know why the KPA1500 does not have internal server capability. It sure would be nice to operate the amplifier without having to have a computer running in the home shack and running the Elecraft remote software (which does

Re: [Elecraft] Efficiency of MFJ remotely-tuned loop antennas

I got a MFJ 10-30m loop at a SK sale. The original owner had never got it to work. The rotor vanes had fallen apart. The fixed vanes were welded to the loop. After re-assembly it worked well, but was difficult to tune as I couldn't hear the buzzer for finding the tune point, it was too high in

Re: [Elecraft] K4 Receive Filter question

That's not a simple or easy question to answer, especially since there's been no independent test of a K4, and there are many different criteria that go into it.  That said,  I'll go out on a limb and say that in most all practical situations on the air, it won't be. I say that because I've

Re: [Elecraft] Automatic lightning protection for radios, .... an off the wall idea

It's been quite a while since I worked in the biz, but IIRC, UL is a NRTL, "Nationally Recognized Testing Laboratory."  They don't approve devices per se, but rather certify a device passed statutory safety standard testing.  A certification only means samples and manufacturing process passed

Re: [Elecraft] Efficiency of MFJ remotely-tuned loop antennas

Resistive Losses around the loop are the biggest factor limiting efficiency. My friend, Paul Casper, K4HKX has done very extensive investigation and documentation of Mag Loop performance. His loops exhibit excellence in both Art and Science. I'd recommend taking in his findings posted on

Re: [Elecraft] Absurd remarks about FCC and ARRL notices.

Serious thinkers need to quietly look at the meaning of "incite", "promote", "instigate", "enable", "direct", "instruct", "Plan" and you will realize there was a plan (by someone) but no evidence of "incite" unless we are disconnected from meaning in language to achieve power. The disconnect of

Re: [Elecraft] Automatic lightning protection for radios, .... an off the wall idea

On 2021-01-18 20:23:-0600, Jim Borowski wrote: >Did I read this right regulation connector?If the clamps on the ground rod, or >water pipe, it is not UL stamped, it's not approved.Jim K9TFSent from my >T-Mobile 4G LTE Device Unfortunately, the email footnotes don't include a link to the archive

Re: [Elecraft] Absurd remarks about FCC and ARRL notices.

Shame on you for bring politics into the Elecraft rmail list. Democrats and Republicans and Independents please keep political factionalism off this email list. Ham radio is fraternity of people interested in radio communications and its art. This kind of post just makes more work for

Re: [Elecraft] Mag Loop from MFJ

Dear OMs,      I have had much success using the Brazilian Alexloop.   It is convenient, unobtrusive, easily packed and does a far better job than I would dream.   I use it travelling with KX2 or KX3.   ITt has been used indoors in a WPX contest for 233 Qs, from inside my sister's Connecticut